CN105238922B - A kind of method of vanadium slag potassiumization roasting - Google Patents
A kind of method of vanadium slag potassiumization roasting Download PDFInfo
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- CN105238922B CN105238922B CN201510823940.5A CN201510823940A CN105238922B CN 105238922 B CN105238922 B CN 105238922B CN 201510823940 A CN201510823940 A CN 201510823940A CN 105238922 B CN105238922 B CN 105238922B
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- vanadium
- roasting
- potassiumization
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- slag
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Abstract
The invention belongs to vanadium extraction chemical technology field, and in particular to a kind of method of vanadium slag potassiumization roasting.The technical problems to be solved by the invention are to provide a kind of vanadium slag potassium method of roasting, comprise the following steps：Compound is obtained after additive and vanadium slag are mixed, binding agent and compound are mixed and made into pelletizing, by pelletizing drying after 780~900 DEG C of roastings；Described additive is potassium carbonate or saleratus；Described binding agent is the potassium hydroxide solution of mass fraction 5~30% or the solution of potassium carbonate of mass fraction 5~30%.This method can not only improve the rate of recovery of vanadium, and it also avoid vanadium slag and bonding is produced during high-temperature roasting.
Description
Technical field
The invention belongs to vanadium extraction chemical technology field, and in particular to a kind of method of vanadium slag potassiumization roasting.
Background technology
The reserves of China's vanadium occupy the 4th, the world, and national You10Duo Ge provinces and cities (area) have vanadium mineral resource, but main collection
In, explored vanadium quite abundant in Sichuan area and Chengde area, especially the vanadium reserves of Panzhihua Region
Nearly 10,000,000,000 tons of titanomagnetite reserves, vanadic anhydride reserves are 15,780,000 tons, account for the 55% of national reserves, world saving
11%.When carrying out vanadium extraction by converter blowing, during by vanadium enrichment into vanadium slag, the side for the mainly sodium roasting vanadium-extracting being widely used at present
Method, in order to reduce the bonding phenomenon of material in roasting process, the residue after adding vanadium extraction during the batch mixing, though so
So reduce the bonding of material, but sacrifice the rate of recovery of vanadium, and also have part batch mixing unequal during roasting
Cause the phenomenon of roasting bonding, table 1 is the main component of each element in vanadium slag.
《Influence of the granularity to vanadium slag roasting conversion rate》In describe the granularity point for climbing vanadium slag used in steel production vanadium oxide
The chemical composition of cloth and different grain size vanadium slag, affecting laws of the vanadium slag granularity to vanadium conversion ratio are have studied, optimize vanadium oxide
Production technology.Be 80~160 mesh in vanadium slag granularity, the ︰ 6 of Fan Zha ︰ tailings=10, alkali than 1.4 under conditions of be calcined clinker vanadium, its turn
Rate reaches 86%.
The content of the invention
In view of the above-mentioned problems of the prior art, the goal of the invention of the present invention is to provide a kind of vanadium slag potassiumization roasting
Method.This method can not only improve the rate of recovery of vanadium, and it also avoid vanadium slag and bonding is produced during high-temperature roasting.
This method technique is simple, use range is wide, cost is low, has very high Social benefit and economic benefit.
The technical problems to be solved by the invention are to provide a kind of method of vanadium slag potassiumization roasting.This method includes following step
Suddenly：Will additive and vanadium slag mix after obtain compound, binding agent and compound are mixed and made into pelletizing, by pelletizing drying after
780~900 DEG C of roastings；Described additive is potassium carbonate or saleratus；Described binding agent be mass fraction 5~
30% potassium hydroxide solution or the solution of potassium carbonate of mass fraction 5~30%.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the granularity of the vanadium slag crosses 200 eye mesh screens.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the Vanadium in Vanadium Residue using vanadic anhydride count content as 5~
30%.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the mol ratio of the additive and Vanadium in Vanadium Residue is 1~4 ︰ 1.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the addition of the binding agent for compound weight 5~
10%.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, a diameter of 3~30mm of the pelletizing.
Further, in the method for above-mentioned vanadium slag potassiumization roasting, a diameter of 5mm of the pelletizing.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the drying be dry 20 at 100~500 DEG C~
120min。
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the temperature of the roasting is 800 DEG C.
Preferably, in the method for above-mentioned vanadium slag potassiumization roasting, the time of the roasting is 0.2~1h.
Further, in the method for above-mentioned vanadium slag potassiumization roasting, the time of the roasting is 1h.
The inventive method material during roasting will not bond, and roasting terminates the leaching rate that rear resulting material leaches and reached
More than 95%, at the same roasting terminate after potassium vanadate compounds can be prepared.
Embodiment
Vanadium slag of the present invention be to vanadium-bearing hot metal in vanadium extracting process it is oxidized blow obtain or concentrate containing vanadium iron
General designation through the bits containing vanadium oxide obtained by wet method vanadium extraction.Mainly there is oxygen top blown with the method for vanadium-bearing hot metal production vanadium slag
The techniques such as vanadium extraction by converter blowing, shaking ladle vanadium extraction and vanadium extraction by spray blowing.Table 1 below is the substantially chemical composition of Converter Vanadium-bearing Slag.
The Converter Vanadium-bearing Slag chemical composition (%) of table 1
| V2O5 | MnO | CaO | MgO | SiO2 | Al2O3 | TFe | Cr2O3 | TiO2 |
| 16.67 | 9.14 | 3.54 | 3.09 | 14.68 | 4.89 | 25.88 | 4.35 | 12.78 |
Embodiment 1
Using Converter Vanadium-bearing Slag in table 1, take 1000g Converter Vanadium-bearing Slags fine powder to be well mixed with 126.4g Anhydrous potassium carbonates, obtain
Compound；20g analysis pure cerium hydroxide potassium is added in 25 DEG C of 200mL water and is prepared into binding agent；Compound is placed in into disk to make
In ball machine, binding agent is sprayed onto in compound, controls the speed of disc balling machine to cause a diameter of 5mm pelletizing, by pelletizing
Muffle furnace is placed in after drying and is heated to 780 DEG C, roasting time 1h.
Below obtained chamotte crushing to 200 mesh, take 100g to be added in 500mL water, be heated to 50 DEG C, leach stirring
20min, obtain containing vanadium solution, it is 30.0g/L to detect vanadium content in solution, and the leaching rate of vanadium is 90%.
Embodiment 2
Using Converter Vanadium-bearing Slag in table 1, take 1000g Converter Vanadium-bearing Slags fine powder to be well mixed with 252.8g Anhydrous potassium carbonates, obtain
Compound；20g analysis pure cerium hydroxide potassium is added in 25 DEG C of 200mL water and is prepared into binding agent；Compound is placed in into disk to make
In ball machine, binding agent is sprayed onto in compound, controls the speed of disc balling machine to cause a diameter of 5mm pelletizing, by pelletizing
Muffle furnace is placed in after drying and is heated to 900 DEG C, roasting time 0.5h.
Below obtained chamotte crushing to 200 mesh, take 100g to be added in 500mL water, be heated to 50 DEG C, leach stirring
20min, obtain containing vanadium solution, it is 30.7g/L to detect vanadium content in solution, and the leaching rate of vanadium is 92.0%.
Embodiment 3
Using Converter Vanadium-bearing Slag in table 1, take 1000g Converter Vanadium-bearing Slags fine powder to be well mixed with 379.2g Anhydrous potassium carbonates, obtain
Compound；20g analysis pure cerium hydroxide potassium is added in 25 DEG C of 200mL water and is prepared into binding agent；Compound is placed in into disk to make
In ball machine, binding agent is sprayed onto in compound, controls the speed of disc balling machine to cause a diameter of 5mm pelletizing, by pelletizing
Muffle furnace is placed in after drying and is heated to 800 DEG C, roasting time 0.5h.
Below obtained chamotte crushing to 200 mesh, take 100g to be added in 500mL water, be heated to 50 DEG C, leach stirring
20min, obtain containing vanadium solution, it is 31.7g/L to detect vanadium content in solution, and the leaching rate of vanadium is 95.0%.
Embodiment 4
Using Converter Vanadium-bearing Slag in table 1, take 1000g Converter Vanadium-bearing Slags fine powder to be well mixed with 505.6g Anhydrous potassium carbonates, obtain
Compound.20g analysis pure cerium hydroxide potassium is added in 25 DEG C of 200mL water and is prepared into binding agent；Compound is placed in into disk to make
In ball machine, binding agent is sprayed onto in compound, controls the speed of disc balling machine to cause a diameter of 5mm pelletizing, by pelletizing
Muffle furnace is placed in after drying and is heated to 800 DEG C, roasting time 0.5h.
Below obtained chamotte crushing to 200 mesh, take 100g to be added in 500mL water, be heated to 50 DEG C, leach stirring
20min, obtain containing vanadium solution, it is 31.7g/L to detect vanadium content in solution, and the leaching rate of vanadium is 95.0%.
Claims (8)
- A kind of 1. method of vanadium slag potassiumization roasting, it is characterised in that：Comprise the following steps：Obtained after additive is mixed with vanadium slag Compound, binding agent and compound are mixed and made into pelletizing, by pelletizing 100~500 DEG C of dry 20~120min after 780~ 900 DEG C of roastings；Described additive is saleratus；Described binding agent is molten for the potassium carbonate of mass fraction 5~30% Liquid；The mol ratio of the additive and Vanadium in Vanadium Residue is 1~4 ︰ 1；The addition of the binding agent for compound weight 5~ 10%.
- 2. the method for vanadium slag potassiumization roasting according to claim 1, it is characterised in that：The granularity of the vanadium slag crosses 200 mesh Screen cloth.
- 3. the method for vanadium slag potassiumization roasting according to claim 1, it is characterised in that：The Vanadium in Vanadium Residue is with five oxidations two Vanadium meter content is 5~30%.
- 4. the method for vanadium slag potassiumization roasting according to claim 1, it is characterised in that：A diameter of the 3 of the pelletizing~ 30mm。
- 5. the method for vanadium slag potassiumization roasting according to claim 4, it is characterised in that：A diameter of 5mm of the pelletizing.
- 6. the method for vanadium slag potassiumization roasting according to claim 1, it is characterised in that：The temperature of the roasting is 800 DEG C.
- 7. the method for vanadium slag potassiumization roasting according to claim 1, it is characterised in that：The time of the roasting be 0.2~ 1h。
- 8. the method for vanadium slag potassiumization roasting according to claim 1, it is characterised in that：The time of the roasting is 1h.
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| CN103031445A (en) * | 2012-11-27 | 2013-04-10 | 攀钢集团攀枝花钢钒有限公司 | Method for effectively roasting and leaching vanadium slag |
| CN104762467A (en) * | 2015-04-01 | 2015-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for implementing vanadium extraction through carrying out sodiumtranslated pellet roasting on vanadium slags |
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